Artificial tooth



Dec. 24, 1929. E s, TRUSLER 1,740,483

ARTIFICIAL TOOTH Filed Jan. 25, 1,928"

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.Inventor Patented Der.. Eel, i929 wedded FRANK S. TRUSLER, GF VERNQN,TEXAS ABTFCAL TOOTH Application filed January 25, 1928.

rl`his invention relates to artificial teeth and it has more particularreference to an interlocking connection between a porcelain facing and ametallic backing or mounting 5 therefor.

l am well aware of the fact that the art to which this invention relatesis quite active, and that a multitude of different types of connectionshave been patented for facilitating mounting of porcelain facings.

lt follows that, in view of my knowledge of the prior devices, l haveevolved and produced what l believe to be a characteristically differenthind of a connection between the facing and backing, which connection isden pendable and accompanied by advantages which will bc hereinaftermade apparent.

My principal aim is to generally improve upon known constructions ofthis class, by providing one which embodies features capable of beingreadily standardized for interchangeability, one which is perfectlysanitary, modernized, practicable in construction, and use.

Referring to the drawings now by numerals Figure l is a view in sectionand elevation showing the novel connection between the facing andbacking.

'Fig'. 2 is a transverse vertical section on an enlarged scale, takenapproximately upon thc plane of the line SM2 of F ig. l.

Referring now to the drawings by reference numerals, it will be observedthat the l metallic backing is designated by the refer ence character 3and that this carries the usual gold casting 4- on its interior. rlhenumeral 5 designates a porcelain facing which, as is understood7 willvary in configuration and size, according to its predetermined positionin the mouth.

ln accordance with the present invention, the porcelain facing 5 isprovided with a cy- J. lindrical pocket having a metal lining G, one

end portion of which projects into a counterbore Disposed concentricallyin this l metal-lined soclet, is a lined coupling pin 8 whose inner endis roughened Or threaded as t o Surrounding the threaded portion ofSerial N0. 249,328.

the pin is a conical ferrule or expanding collar 10.

rlie complemental backing plate is pr0- vided with a cylindrical casingl1 and a central coupling1 tube l2, which telescopically receives thepin 8. The casing 1l is of a diameter to lit snugly and telescopicallywithin the lining f3 of the socket. lt will be noted that a conicalexpanding collar 13 surrounds the casing ll. lt follows that when the ltogether in the telescoping A .its are litteu relationship shown in Fig.l, one end of the lining will be spread on the collar 13 out into thecounter-bore 7, and that one end of the coupling tube l2 will beexpanded or flared outwardly on the conical expander lO.

The numeral lildesignates the cement filler which is placed between thetube l2 and the surrounding casing l1. Then too, l employ one or moreeccentric pins l5 on the backing plate, these extending in sockets inthe facing to prevent relative rotation of the backing plate, andfacing.

lt is obvious from the foregoing, that what l have endeavored to do, isto provide a dependable connection between the porcelain f cing andmetallic backing in artificial tooth constructions. It is evident thatthe structure as herein shownand described is eflicient in performance,and capable of fulfilling the requirement of a device of this class.

lt is economical form every standpoint, and especially suitable forpractical use by dentists. lt is believed, however, that personsslrilled in the art to which the invention relates will be able tounderstand and appreciate the superior features. rlherefore, a morelengthy description is regarded unnecessary.

Minor changes in shape, and size, and rearrangement of details comingwithin the field of invention claimed may be resorted to if desired.

Having thus described my invention, what l claim as new is ln anartificial tooth construction, a backing member, a facing associatedtherewith, said facing being formed in one side with socket, a metallining for the socket, a concentric pin mounted in said socket, a tubecarried by said backing member and fitting snugly and telescopicallyupon said pin, eX- panding means between the pin and free end portion ofthe tube, a cylindrical casing carried by said backing member, andsurround= ing said tube, in spaced concentric relation, said casingiitting telescopically into said socket, and being` in contact with thesocket lining, und expanding means interposed between said casing andthe free end portion of said lining.

In testimony whereof I aiix my signaturee FRANK S. TRUSLER.

